Process of forming turnbuckles



July 22, 1924.

C. E. ANDERSON PROCESS 0F FORMING TURNBUCKLES Filed Oct. 5 1921 .hay 2a, leze.

c E, AND or GRAND g or en nja, monteren, f Haven, Niemann, e ooona'rron or momenti.

'raison 'ro non-.cme

Application :Bled 0otober\5, 1921. Serial No. 505,630.

To all 'whom t may concern.'

Be it known that I, CARL E. ANDERSON, a subject of the King of Sweden, residing at Grand Haven, in the county of Ottawa and State of Michigan, have invented certain new and useful Improvements in Processes of Forming Turnbuckles, of which the following is a specification.

This invention relates to improvements in clevises,'turn buckles and the like, and to improvements in processes of forming the same.

The principal object of the invention is to provide improved means whereby the clevis or turn buckle is formed from sheet metal, therby greatly simplifying and cheapenmg the process of manufacturing the device.

Other objects relate to various vfeatures of construction and arrangement and to various operations of forming these devices, as will be hereinafter more fully explained.

The nature of the invention will be understood from the following specification taken with the accompanying drawings, 1n which one form of clevs and one formof turn buckle, with one method of forming each of them are set forth.

In the drawings Fig. 1 is a plan view of a sheet metal blank, which is partially cut away 1n carrying out the first step of the process of forming the clevis.

Fig. 2 is an formed clevis.

Fig. 3 is a side elevation of the completed clevis.

Fig. 4 shows vertical section through the clevis on line 4-4 of Fig. 3.

Fig. 5 shows an end elevation of the clevis looking toward the top thereof as viewed in Fi 3.

Fig. 6 is a plan view of sheet metal blank showing the rst step of the process of formin a turn buckle.

Fi 7 shows a side .elevation of the complete turn buckle, and

Fig. 8 shows a vertical section of Fig. 7.

In Figs. 1 to the clevis is shown as metal blank 10, which to form a member 11, having an upper body 11lv and two parallel arms 11". During the operation of stamping the member 11 from end elevation of the partially on line 8-8 5 inclusive of the drawings formed from a sheet is partially cut away the metal sheet, apertures 12 are punched ,through the lower'ends 'of the arms '11", the

metal being projected outwardly in forming these apertures to provide -annular flanges 13.. After the member 11 has been formed as lllustrated in Fig. 1, the body portion 11a thereof is operated upon by a suitable die press or otherdevice in order to bend the member 11a into circular or cylindrical form thus providing a cylinder 14 at theupper ends of the tw'oarms 11h which are thus drawn into positionin parallel planes as shown in Fig. 4. Fig. 2 of the drawings shows the body portion 11*l partially bent into cylindrical form. After this bending operation has been completed, the meeting edges 15 of the body portion 11a may preferably be welded together in the cylindrical extremity of the clevis. An outer cylinder or collar 16 is preferably pressed onto the cylinder 14 in order to prevent the spreading thereof. The collar 16 may be drawn from sheet metal,.or if desired, these collars v may be cut from drawn metal tubing. After the parts have thus been formed, the cylinder lmay be internally threaded as shown at 17 to permit the ready connection thereof with a rod or other device with which it is to be used.

In Figs. 6, 7 and 8 of the drawings, there is illustrated a form of a turn buckle by a similar process of 'manufacture 'Ihe first step in the formation of a turn buckle consists of cutting a sheet metal blank 2O to form a member 21, consisting of two upper and lower bands 22, connected'by p'arallel straps 23, an aperture 24 being provided be- Itween the straps, and the metal in the outer side thereof being cut away, as shown at 25. After the member 21 has been formed, the bands 22 are bent into cylindrical form, thus forming cylinders 26 at the ends of the device with the connecting straps 23 lying in parallel planes. During this operation the straps 23 may be held apart so that they are slightly bowed in an outward direction as'shown in Fig. 8. After the cylinders 26 have thus been formed, collars 27 are preferably shrunk into position thereon in order to prevent separation of the meeting edges which, however, may be welded together as in the construction previously described. The cylinders 26 are shown as bein internally threaded at 28.

e processes herein described provide a ready means of forming clevises and turn los buckles from sheet metal and'constitute a great improvement upon the practice heretofore known' according to which devices of this kind have been forged or formed of wrou ht metal.

Alt ough certain methods'of construction have been explained for the purpose of illustration, itvsvvill be understood that the devices herein describedvand the processes of forming them may be altered in various Ways Without departing from the scope of the a pended claims.

ll c aim 1. The process of forming a turnbuckle, Which comprises the operations of cutting a sheet metal blank to form a member having parallel transverse parts connected by parallel arms, and bending said transverse parts to form two cylinders and to bring said arms into parallel planes connecting said cylinders,

l 2. The process of forming a turnbuckle9 recense which com rises the operations of cuttin a sheet meta blank to form a member having parallel transverse parts connected by paralel arms, bending said transverse parts to n orm two cylinders and to bring said arms into parallel (planes connecting said cylinders, and Wel ing the'meeting edges of said transverse parts.

3. The process of forming a turnbuckle, which comprises the operations of cutting a sheet metal blank to form a member having arallel transverse parts connected by para el arms, bending said transverse parte to form two cylinders and to bring said arms into parallel planes connecting said cylinders, and pressing cylindrical members on to said cylinders formed by bending said transverse parts.

lin testimony whereof, ll have subscribed my name.

CARL E. ANDERSUN, 

